2010 Cadillac Truck SRX FWD V6-3.0L Page 1485

2010 Cadillac Truck SRX FWD V6-3.0L Page 1485

1. Ignition OFF, disconnect the KR25 secondary air injection pump relay.

2. Test for 70-110 ohm between terminals 85 and 86.

瀚慖f the resistance is not within the specified range, replace the KR25 secondary air injection pump relay.

3. Test for infinite resistance between the following terminals:

* 86 and 87

* 86 and 30

* 85 and 87

* 87 and 30

瀚慖f not the specified value, replace the KR25 secondary air injection pump relay.

4. Install a 20 A fused jumper wire between relay terminal 86 and 12 V. Install a jumper wire between relay terminal 85 and ground. Test for

less than 2 ohm between terminals 87 and 30.

瀚慖f greater than the specified range, replace the KR25 secondary air injection pump relay.

Repair Instructions

Perform the Diagnostic Repair Verification (See: Verification Tests) after completing the diagnostic procedure.

* Relay Replacement (Attached to Wire Harness) (See: Power and Ground Distribution/Power Distribution Relay/Service and Repair/Relay

Replacement (Attached to Wire Harness))Relay Replacement (Within an Electrical Center) (See: Power and Ground Distribution/Power

Distribution Relay/Service and Repair/Relay Replacement (Within an Electrical Center))

* Secondary Air Injection Pump Replacement (See: Powertrain Management/Emission Control Systems/Air Injection/Air Injection

Pump/Service and Repair)

P0418

DTC P0418, P2257, or P2258

Diagnostic Instructions

* Perform the Diagnostic System Check - Vehicle (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic System

Check - Vehicle) prior to using this diagnostic procedure.

* Review Strategy Based Diagnosis (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Strategy Based Diagnosis) for an

overview of the diagnostic approach.

* Diagnostic Procedure Instructions (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic Procedure

Instructions)provides an overview of each diagnostic category.

DTC Descriptors

DTC P0418

- Secondary Air Injection Pump Control Circuit

DTC P2257

- Secondary Air Injection Pump Relay Control Circuit Low Voltage

DTC P2258

- Secondary Air Injection Pump Relay Control Circuit High Voltage

Diagnostic Fault Information

Circuit/System Description

The secondary air injection system aids in the reduction of hydrocarbon emissions during a cold start. The electric air pump forces fresh air into the

exhaust stream in order to accelerate the catalyst operation. Ignition voltage is supplied directly to the secondary air injection pump relay. The

engine control module (ECM) controls the relay by grounding the control circuit with a solid state device called a driver. The driver is equipped

with a feedback circuit that is pulled-up to a voltage. The ECM can determine if the control circuit is open, shorted to ground, or shorted to a

2010 Cadillac Truck SRX FWD V6-3.0L Page 1804

2010 Cadillac Truck SRX FWD V6-3.0L Page 1804

1. Ignition OFF, remove the control solenoid valve assembly. Refer to Control Solenoid Valve and Transmission Control Module Assembly

Replacement (See: Powertrain Management/Transmission Control Systems/Actuators and Solenoids - Transmission and

Drivetrain/Actuators and Solenoids - A/T/Shift Solenoid/Service and Repair).

2. Perform the Control Solenoid Valve and Transmission Control Module Assembly Inspection (See: Transmission and Drivetrain/Automatic

Transmission/Transaxle/Testing and Inspection/Component Tests and General Diagnostics/6T70/6T75 - Automatic Transmission/Control

Solenoid Valve and Transmission Control Module Assembly Inspection).

3. Place the control solenoid valve assembly on a clean work surface near the transmission assembly.

4. Connect DT-47825-20 - jumper harness between the vehicle wire harness electrical connector, and the control solenoid valve assembly

electrical connector.

5. Ignition ON, verify with a scan tool the following test status parameters display OK:

* Line PC Sol. Perf. Test Status

* Line PC Sol. Ckt. High Voltage Test Status

* Line PC Sol. Ckt. Low Voltage Test Status

瀚慖f any test status parameter displays Fault or Malfunction, replace the control solenoid valve assembly.

Repair Instructions

Important:

* Perform the Service Fast Learn Adapts (See: Transmission and Drivetrain/Automatic Transmission/Transaxle/Testing and

Inspection/Programming and Relearning) following all transmission related repairs.

* Before replacing the TCM, perform the Control Solenoid Valve and Transmission Control Module Assembly Inspection (See:

Transmission and Drivetrain/Automatic Transmission/Transaxle/Testing and Inspection/Component Tests and General

Diagnostics/6T70/6T75 - Automatic Transmission/Control Solenoid Valve and Transmission Control Module Assembly Inspection).

Perform the Diagnostic Repair Verification (See: Verification Tests) after completing the diagnostic procedure.

Control Module References (See: Testing and Inspection/Programming and Relearning) for control solenoid valve assembly replacement, setup,

and programming

AF40-6 - Automatic Transmission

DTC P0748 or P0961-P0963

Diagnostic Instructions

* Perform the Diagnostic System Check - Vehicle (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic System

Check - Vehicle) prior to using this diagnostic procedure.

* Review Strategy Based Diagnosis (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Strategy Based Diagnosis) for an

overview of the diagnostic approach.

* Diagnostic Procedure Instructions (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic Procedure

Instructions) provides an overview of each diagnostic category.

DTC Descriptors

DTC P0748

- Line Pressure Control Solenoid Valve System Performance

DTC P0961

- Line Pressure Control Solenoid Valve System Performance

DTC P0962

- Line Pressure Control Solenoid Valve Control Circuit Low Voltage

DTC P0963

- Line Pressure Control Solenoid Valve Control Circuit High Voltage

Diagnostic Fault Information

Typical Scan Tool Data

2010 Cadillac CTS Sedan AWD V6-3.6L Page 920

2010 Cadillac CTS Sedan AWD V6-3.6L Page 920

1. Ignition OFF, disconnect the harness connector at the heated oxygen sensor (HO2S) sensor.

2. Test for 5-25 ohm between the terminals C and D of the HO2S.

瀚慖f not within the specified range, replace the HO2S sensor.

Repair Instructions

Perform the Diagnostic Repair Verification (See: Verification Tests) after completing the diagnostic procedure.

* Heated Oxygen Sensor Replacement - Bank 1 Sensor 1 (LF1) (See: Powertrain Management/Computers and Control Systems/Oxygen

Sensor/Service and Repair)Heated Oxygen Sensor Replacement - Bank 1 Sensor 1 (LLT) (See: Powertrain Management/Computers and

Control Systems/Oxygen Sensor/Service and Repair)

* Heated Oxygen Sensor Replacement - Bank 1 Sensor 2 (LF1) (See: Powertrain Management/Computers and Control Systems/Oxygen

Sensor/Service and Repair)Heated Oxygen Sensor Replacement - Bank 1 Sensor 2 (LLT) (See: Powertrain Management/Computers and

Control Systems/Oxygen Sensor/Service and Repair)

* Heated Oxygen Sensor Replacement - Bank 2 Sensor 1 (LF1) (See: Powertrain Management/Computers and Control Systems/Oxygen

Sensor/Service and Repair)Heated Oxygen Sensor Replacement - Bank 2 Sensor 1 (LLT) (See: Powertrain Management/Computers and

Control Systems/Oxygen Sensor/Service and Repair)

* Heated Oxygen Sensor Replacement - Bank 2 Sensor 2 (LF1) (See: Powertrain Management/Computers and Control Systems/Oxygen

Sensor/Service and Repair)Heated Oxygen Sensor Replacement - Bank 2 Sensor 2 (LLT) (See: Powertrain Management/Computers and

Control Systems/Oxygen Sensor/Service and Repair)

* Control Module References (See: Testing and Inspection/Programming and Relearning) for engine control module replacement, setup, and

programming

P0036

DTC P0030, P0031, P0032, P0036, P0037, P0038, P0050, P0051, P0052, P0056, P0057, or P0058 (LLT)

Diagnostic Instructions

* Perform the Diagnostic System Check - Vehicle (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic System

Check - Vehicle) prior to using this diagnostic procedure.

* Review Strategy Based Diagnosis (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Strategy Based Diagnosis) for an

overview of the diagnostic approach.

* Diagnostic Procedure Instructions (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic Procedure

Instructions) provides an overview of each diagnostic category.

DTC Descriptors

DTC P0030

- HO2S Heater Control Circuit Bank 1 Sensor 1

DTC P0031

- HO2S Heater Control Circuit Low Voltage Bank 1 Sensor 1

DTC P0032

- HO2S Heater Control Circuit High Voltage Bank 1 Sensor 1

DTC P0036

- Heater Control Circuit Bank 1 Sensor 2

DTC P0037

- HO2S Heater Control Circuit Low Voltage Bank 1 Sensor 2

DTC P0038

- HO2S Heater Control Circuit High Voltage Bank 1 Sensor 2

DTC P0050

- HO2S Heater Control Circuit Bank 2 Sensor 1

DTC P0051

- HO2S Heater Control Circuit Low Voltage Bank 2 Sensor 1

DTC P0052

- HO2S Heater Control Circuit High Voltage Bank 2 Sensor 1

DTC P0056

- HO2S Heater Control Circuit Bank 2 Sensor 2

2010 Cadillac CTS Sedan AWD V6-3.6L Page 929

2010 Cadillac CTS Sedan AWD V6-3.6L Page 929

1. Ignition OFF, disconnect the harness connector at the appropriate heated oxygen sensor (HO2S).

2. Ignition ON, verify that a test lamp illuminates between the ignition circuit terminal D and ground.

Note: The ignition circuit supplies voltage to other components. Make sure you test all circuits for a short to ground or test all components

for being shorted that share the ignition circuit.

瀚慖f the test lamp does not illuminate, test the ignition circuit for a short to ground or an open/high resistance. If the circuit tests normal and

the ignition circuit fuse is open, test all the components connected to the ignition circuit and replace as necessary.

3. Connect a test lamp between the heater control circuit terminal C and B+. The test lamp should not illuminate.

瀚慖f the test lamp is always ON, test the control circuit for a short to ground. If the circuit/connections test normal, replace the ECM.

Note: The control circuit for the HO2S heater is pulled-up to voltage within the ECM, 2.0-3.0 volts on the control circuit is normal.

4. Idle the engine, and verify the test lamp illuminates or flashes.

瀚慖f the test lamp is always OFF, test the control circuit for an open/high resistance. If the circuit/connections test normal, replace the ECM.

5. Ignition ON, test for 2.0-3.0 V between the control circuit terminal C and ground.

瀚慖f not within the specified range, test the control circuit for a short to voltage. If the circuit/connections test normal, replace the ECM.

6. If all circuits/connections test normal, test or replace the HO2S sensor.

Component Testing

1. Ignition OFF, disconnect the harness connector at the heated oxygen sensor (HO2S) sensor.

2. Test for 5-25 ohm between the terminals C and D of the HO2S.

瀚慖f not within the specified range, replace the HO2S sensor.

Repair Instructions

Perform the Diagnostic Repair Verification (See: Verification Tests) after completing the diagnostic procedure.

* Heated Oxygen Sensor Replacement - Bank 1 Sensor 1 (LF1) (See: Powertrain Management/Computers and Control Systems/Oxygen

Sensor/Service and Repair)Heated Oxygen Sensor Replacement - Bank 1 Sensor 1 (LLT) (See: Powertrain Management/Computers and

Control Systems/Oxygen Sensor/Service and Repair)

* Heated Oxygen Sensor Replacement - Bank 1 Sensor 2 (LF1) (See: Powertrain Management/Computers and Control Systems/Oxygen

Sensor/Service and Repair)Heated Oxygen Sensor Replacement - Bank 1 Sensor 2 (LLT) (See: Powertrain Management/Computers and

Control Systems/Oxygen Sensor/Service and Repair)

* Heated Oxygen Sensor Replacement - Bank 2 Sensor 1 (LF1) (See: Powertrain Management/Computers and Control Systems/Oxygen

Sensor/Service and Repair)Heated Oxygen Sensor Replacement - Bank 2 Sensor 1 (LLT) (See: Powertrain Management/Computers and

Control Systems/Oxygen Sensor/Service and Repair)

* Heated Oxygen Sensor Replacement - Bank 2 Sensor 2 (LF1) (See: Powertrain Management/Computers and Control Systems/Oxygen

Sensor/Service and Repair)Heated Oxygen Sensor Replacement - Bank 2 Sensor 2 (LLT) (See: Powertrain Management/Computers and

Control Systems/Oxygen Sensor/Service and Repair)

* Control Module References (See: Testing and Inspection/Programming and Relearning) for engine control module replacement, setup, and

programming

P0050

DTC P0030, P0031, P0032, P0036, P0037, P0038, P0050, P0051, P0052, P0056, P0057, or P0058 (LLT)

Diagnostic Instructions

* Perform the Diagnostic System Check - Vehicle (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic System

Check - Vehicle) prior to using this diagnostic procedure.

* Review Strategy Based Diagnosis (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Strategy Based Diagnosis) for an

overview of the diagnostic approach.

* Diagnostic Procedure Instructions (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic Procedure

Instructions) provides an overview of each diagnostic category.

DTC Descriptors

DTC P0030

- HO2S Heater Control Circuit Bank 1 Sensor 1

2010 Cadillac CTS Sedan AWD V6-3.6L Page 1093

2010 Cadillac CTS Sedan AWD V6-3.6L Page 1093

1. Ignition OFF, disconnect the harness connector at the appropriate HO2S 1.

2. Ignition ON, verify that the scan tool HO2S 1 voltage parameter is between 350-500 mV.

瀚慖f less than the specified range, test the signal circuit terminal B for a short to ground. If the circuit/connections test normal, replace the

ECM.

瀚慖f greater than the specified range, test the signal circuit terminal B for a short to voltage. If the circuit/connections test normal, replace

the ECM.

3. Install a 3 A fused jumper wire between the signal circuit terminal B and ground. Verify the HO2S voltage parameter is less than 60 mV.

瀚慖f greater than the specified range, test the signal circuit for an open/high resistance. If the circuit/connections test normal, replace the

ECM.

4. Connect a 3 A fused jumper wire between the signal circuit terminal B and the low reference circuit terminal A. Verify the HO2S voltage

parameter is less than 60 mV.

瀚慖f greater than the specified range, test the low reference circuit for an open/high resistance or for a short to voltage. If the

circuit/connections test normal, replace the ECM.

5. Verify that the following conditions do not exist:

* Lean condition.

* Low fuel system pressure-Refer to Fuel System Diagnosis (See: Powertrain Management/Computers and Control Systems/Testing and

Inspection/Component Tests and General Diagnostics/Fuel System Diagnosis).

* Fuel that is contaminated-Refer to Alcohol/Contaminants-in-Fuel Diagnosis (with Special Tool) (See: Powertrain

Management/Computers and Control Systems/Testing and Inspection/Component Tests and General

Diagnostics/Alcohol/Contaminants-in-Fuel Diagnosis (with Special Tool))Alcohol/Contaminants-in-Fuel Diagnosis (without Special

Tool) (See: Powertrain Management/Computers and Control Systems/Testing and Inspection/Component Tests and General

Diagnostics/Alcohol/Contaminants-in-Fuel Diagnosis (without Special Tool)).

* Exhaust leaks near the HO2S.

* Engine vacuum leaks.

瀚慖f you find any of the above conditions, repair as necessary.

6. If all circuits/connections test normal, replace the appropriate HO2S 1.

Repair Instructions

Perform the Diagnostic Repair Verification (See: Verification Tests) after completing the diagnostic procedure.

* Heated Oxygen Sensor Replacement - Bank 1 Sensor 1 (LF1) (See: Powertrain Management/Computers and Control Systems/Oxygen

Sensor/Service and Repair)Heated Oxygen Sensor Replacement - Bank 1 Sensor 1 (LLT) (See: Powertrain Management/Computers and

Control Systems/Oxygen Sensor/Service and Repair)

* Heated Oxygen Sensor Replacement - Bank 2 Sensor 1 (LF1) (See: Powertrain Management/Computers and Control Systems/Oxygen

Sensor/Service and Repair)Heated Oxygen Sensor Replacement - Bank 2 Sensor 1 (LLT) (See: Powertrain Management/Computers and

Control Systems/Oxygen Sensor/Service and Repair)

* Control Module References (See: Testing and Inspection/Programming and Relearning) for engine control module replacement, setup, and

programming

P0152

DTC P0132 or P0152 (with LLT)

Diagnostic Instructions

* Perform the Diagnostic System Check - Vehicle (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic System

Check - Vehicle) prior to using this diagnostic procedure.

* Review Strategy Based Diagnosis (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Strategy Based Diagnosis) for an

overview of the diagnostic approach.

* Diagnostic Procedure Instructions (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic Procedure

Instructions) provides an overview of each diagnostic category.

DTC Descriptors

DTC P0132

- HO2S Circuit High Voltage Bank 1 Sensor 1

DTC P0152

- HO2S Circuit High Voltage Bank 2 Sensor 1

2010 Cadillac CTS Sedan AWD V6-3.6L Page 526

2010 Cadillac CTS Sedan AWD V6-3.6L Page 526

1. Ignition OFF, disconnect the harness connector at the tilt/telescope switch.

2. Ignition ON, verify a test lamp illuminates between terminal 4 and ground.

瀚慖f the test lamp does not illuminate, test the B+ circuit for a short to ground or an open/high resistance.

3. Verify with the scan tool that the appropriate switch parameter is Inactive.

瀚慖f not the specified value, test the appropriate signal circuit for a short to voltage. If the circuit tests normal, replace the MSM.

4. Install a 3A fused jumper wire between the appropriate circuit terminal 1, 2, 3, or 5 and terminal 4. Verify with the scan tool that the

appropriate switch parameter is Active.

瀚慖f not the specified value, test the signal circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the

MSM.

5. If all circuit test normal, test or replace the tilt/telescope switch.

Component Testing

Tilt/Telescope Switch

1. Ignition OFF, disconnect the harness connector at the tilt/telescope switch.

2. Test for infinite resistance between terminals 1, 2, 3, and 5 with the switch in the neutral position:

瀚慖f less than the specified range, replace the tilt/telescope switch.

3. Test for less than 1 ohm between terminal 4 and terminals 1, 2, 3, and 5 with the switch in each appropriate position.

瀚慖f greater than the specified value, replace the tilt/telescope switch.

Repair Instructions

Perform the Diagnostic Repair Verification (See: Verification Tests) after completing the diagnostic procedure.

* Steering Column Replacement (See: Steering and Suspension/Steering/Steering Column/Service and Repair/Steering Column Replacement)

* Control Module References (See: Testing and Inspection/Programming and Relearning)for MSM replacement, setup, and programming

B2855

DTC B2850, B2855, B2870, or B2875

Diagnostic Instructions

* Perform the Diagnostic System Check - Vehicle (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic System

Check - Vehicle) prior to using this diagnostic procedure.

* Review Strategy Based Diagnosis (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Strategy Based Diagnosis) for an

overview of the diagnostic approach

* Diagnostic Procedure Instructions (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic Procedure

Instructions)provides an overview of each diagnostic category

DTC Descriptor

DTC B2850 01

- Telescope Forward Switch Circuit Short to Battery

DTC B2855 01

- Telescope Rearward Switch Circuit Short to Battery

DTC B2870 01

- Tilt Up Switch Circuit Short to Battery

DTC B2875 01

- Tilt Down Switch Circuit Short to Battery

Diagnostic Fault Information

2010 Cadillac CTS Sedan AWD V6-3.6L Page 487

2010 Cadillac CTS Sedan AWD V6-3.6L Page 487

1. Ignition OFF, disconnect the harness connector at the A10 inside rearview mirror.

2. Test for less than 10 Ohms between the mirror ground circuit terminal 8 and ground.

瀚慖f greater than the specified range, test the ground circuit for an open/high resistance.

3. Ignition ON, test for less than 1 V between the keypad signal circuit terminal 11 and ground.

瀚慖f greater than the specified range, test the keypad signal circuit for a short to voltage. If the circuit tests normal, replace the CIM.

4. Ignition OFF, test for 600k-800k Ohms between the keypad signal circuit terminal 11 and ground.

瀚慖f less than the specified range, test the keypad signal circuit for a short to ground. If the circuit tests normal, replace the CIM.

瀚慖f greater than the specified range, test the keypad signal circuit for an open/high resistance. If the circuit tests normal, replace the CIM.

5. Ignition ON, test for 9.5-10.5 V between the keypad supply voltage circuit terminal 12 and ground.

瀚慖f less than the specified range, test the supply voltage circuit for a short to ground or open/high resistance. If the circuit tests normal,

replace the CIM.

瀚慖f greater than the specified range, test the supply voltage circuit for a short to voltage. If the circuit tests normal, replace the CIM.

6. If all circuits test normal, test or replace the button assembly.

Repair Instructions

Perform the Diagnostic Repair Verification (See: Verification Tests) after completing the diagnostic procedure.

* Inside Rearview Mirror Replacement (See: Body and Frame/Mirrors/Service and Repair/Inside Rearview Mirror Replacement)

* Control Module References (See: Testing and Inspection/Programming and Relearning) for CIM replacement, setup, and programming

B2482

DTC B2476 or B2482

Diagnostic Instructions

* Perform the Diagnostic System Check - Vehicle (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic System

Check - Vehicle) prior to using this diagnostic procedure.

* Review Strategy Based Diagnosis (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Strategy Based Diagnosis) for an

overview of the diagnostic approach.

* Diagnostic Procedure Instructions (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic Procedure

Instructions) provides an overview of each diagnostic category.

DTC Descriptors

DTC B2476 04

- Cellular Phone Select Service Switch Open Circuit

DTC B2476 59

- Cellular Phone Select Service Switch Stuck Button

DTC B2482 00

- Cellular Phone Select Service Switch Range/Performance

Diagnostic Fault Information

2010 Cadillac Truck SRX AWD V6-3.0L Page 678

2010 Cadillac Truck SRX AWD V6-3.0L Page 678

1. Ignition OFF, disconnect the harness connector at the M16 adjustable pedal assembly.

2. Ignition OFF, test for less than 10 ohm between the low reference circuit terminal 4 and ground.

瀚慖f greater than the specified range, test the low reference circuit for an open/high resistance. If the circuit tests normal, replace the K40

memory seat control module.

3. Ignition ON, test for 4.8-5.2 V between the 5 V reference circuit terminal 6 and ground.

瀚慖f less than the specified range, test the 5 V reference circuit for a short to ground or an open/high resistance. If the circuit tests normal,

replace the K40 memory seat control module.

瀚慖f greater than the specified range, test the 5 V reference circuit for a short to voltage. If the circuit tests normal, replace the K40 memory

seat control module.

4. Ignition ON, verify the scan tool Adjustable Pedals Horizontal Position parameter is less than 0.45 V.

瀚慖f greater than the specified range, test the signal circuit terminal 5 for a short to voltage. If the circuit tests normal, replace the K40

memory seat control module.

5. Install a 3 A fused jumper wire between the signal circuit terminal 5 and the 5 V reference circuit terminal 6. Verify the scan tool Adjustable

Pedals Horizontal Position parameter is greater than 4.75 V.

瀚慖f less than the specified range, test the signal circuit for short to ground or an open/high resistance. If the circuit tests normal, replace the

K40 memory seat control module.

6. If all circuits test normal, test or replace the M16 adjustable pedal assembly.

B3606 61

1. Ignition ON, verify that no other adjustable pedal DTCs are set.

瀚慖f other adjustable pedal DTCs are set, diagnosis those DTCs first.

2. Ignition OFF, disconnect the harness connector at M16 adjustable pedal assembly.

3. Connect a test lamp between the motor control circuit terminal 2 and terminal 3.

4. Ignition ON, verify that a test lamp illuminates while commanding the adjustable pedals to move in both directions with the scan tool.

瀚慖f the test lamp does not illuminate, test the motor control circuits for an open/high resistance. If the circuits test normal replace the K40

memory seat control module.

5. If all circuits test normal, test or replace the M16 adjustable pedal assembly.

Repair Instructions

Perform the Diagnostic Repair Verification (See: Verification Tests) after completing the diagnostic procedure.

* Brake Pedal Assembly Replacement (See: Accessories and Optional Equipment/Pedal Positioning System/Service and Repair/Removal and

Replacement/Brake Pedal Assembly Replacement)

* Control Module References (See: Testing and Inspection/Programming and Relearning) for the K40 memory seat control module

replacement, setup, and programming

B3607

DTC B3607

Diagnostic Instructions

* Perform the Diagnostic System Check - Vehicle (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic System

Check - Vehicle) prior to using this diagnostic procedure.

* Review Strategy Based Diagnosis (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Strategy Based Diagnosis) for an

overview of the diagnostic approach.

* Diagnostic Procedure Instructions (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic Procedure

Instructions) provides an overview of each diagnostic category.

DTC Descriptor

DTC B3607 4B

- Adjustable Pedal Motor Circuit Calibration Not Learned

Circuit/System Description

After replacement of adjustable pedal mechanical components or if the memory seat control module is reprogrammed or replaced, the adjustable

2010 Cadillac Truck SRX AWD V6-3.0L Page 1017

2010 Cadillac Truck SRX AWD V6-3.0L Page 1017

1. Ignition OFF, disconnect the harness connector at the B47 fuel pressure sensor.

2. Ignition OFF, test for less than 1 ohm between the low reference circuit terminal 2 and ground.

瀚慖f greater than the specified range, test the low reference circuit for an open/high resistance. If the circuit tests normal, replace the K27

fuel pump flow control module.

3. Ignition ON, test for 4.8-5.2 V between the B47 fuel pressure sensor 5 V reference circuit terminal 3 and ground.

瀚慖f less than the specified range, test the 5 V reference circuit for a short to ground or an open/high resistance. If the circuit tests normal,

replace the K27 fuel pump flow control module.

瀚慖f greater than the specified range, test the 5 V reference circuit for a short to voltage. If the circuit tests normal, replace the K27 fuel

pump flow control module.

4. Verify the scan tool fuel pressure sensor voltage is less than 1 V.

瀚慖f greater than the specified range, test the signal circuit terminal 1 for a short to voltage. If the circuit tests normal, replace the K27 fuel

pump flow control module.

5. Install a 3 A fused jumper wire between the signal circuit terminal 1 and the 5 V reference circuit terminal 3. Verify the scan tool 5 V

reference is greater than 4.8 V.

瀚慖f less than the specified range, test the signal circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace

the K27 fuel pump flow control module.

6. If all circuits test normal, replace the B47 fuel pressure sensor.

Repair Instructions

Perform the Diagnostic Repair Verification (See: Verification Tests) after completing the diagnostic procedure.

* Fuel Pressure Sensor Replacement - Fuel Injection Fuel Rail (See: Powertrain Management/Fuel Delivery and Air Induction/Fuel Pressure

Sensor/Switch/Service and Repair/Fuel Pressure Sensor Replacement - Fuel Injection Fuel Rail)

* Control Module References (See: Testing and Inspection/Programming and Relearning) for fuel pump control module replacement, setup,

and programming

P018D

DTC P018B-P018D

Diagnostic Instructions

* Perform the Diagnostic System Check - Vehicle (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic System

Check - Vehicle) prior to using this diagnostic procedure.

* Review Strategy Based Diagnosis (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Strategy Based Diagnosis) for an

overview of the diagnostic approach.

* Diagnostic Procedure Instructions (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic Procedure

Instructions) provides an overview of each diagnostic category.

DTC Descriptors

DTC P018B

- Fuel Pressure Sensor Performance

DTC P018C

- Fuel Pressure Sensor Circuit Low Voltage

DTC P018D

- Fuel Pressure Sensor Circuit High Voltage

Diagnostic Fault Information

Circuit/System Description

2010 Cadillac CTS Sedan AWD V6-3.6L Page 1116

2010 Cadillac CTS Sedan AWD V6-3.6L Page 1116

1. Ignition OFF, disconnect the harness connector at the G18 high pressure fuel pump.

Note: The DMM and test leads must be calibrated to 0 ohm in order to prevent misdiagnosis.

2. Test for 9-11 ohm at 25掳C (77掳F) between the low control circuit terminal 1 and the high control circuit terminal 2.

瀚慖f not within the specified range, replace the G18 high pressure fuel pump.

3. Measure the resistance between each terminal and the high pressure fuel pump housing. The DMM should display OL.

瀚慖f less than the specified value, replace the G18 high pressure fuel pump.

4. Ignition OFF, verify that a test lamp does not illuminate between B+ and the low control circuit terminal 1.

瀚慖f the test lamp illuminates, test the low control circuit for a short to ground. If the circuit tests normal, replace the K20 ECM.

5. Ignition ON, verify that a test lamp does not illuminate between ground and the high control circuit terminal 2.

瀚慖f the test lamp illuminates, test the high control circuit for a short to voltage. If the circuit tests normal, replace the K20 ECM.

6. Ignition ON, command the Fuel Pressure Regulator ON with a scan too. Verify that the test lamp illuminates.

瀚慖f the test lamp does not illuminate, test the high control circuit for a short to ground or an open/high resistance. If the circuit tests normal,

replace the K20 ECM.

7. Ignition OFF, connect a test lamp between the low control circuit terminal 1 and B+.

8. Ignition ON, command the Fuel Pressure Regulator ON with a scan tool. Verify that the test lamp illuminates.

瀚慖f the test lamp does not illuminate, test the low control circuit for a short to voltage or an open/high resistance. If the circuit tests normal,

replace the K20 ECM.

9. If all circuits and the high pressure fuel pump test normal, replace the K20 ECM.

Repair Instructions

Perform the Diagnostic Repair Verification (See: Verification Tests) after completing the diagnostic procedure.

* Fuel Pump Replacement (See: Powertrain Management/Fuel Delivery and Air Induction/Fuel Pump/Service and Repair)

* Control Module References (See: Testing and Inspection/Programming and Relearning) for engine control module replacement, setup, and

programming

P167D

DTC P0601-P0604, P0606, P167D, or P2610 (ECM, LLT)

Diagnostic Instructions

* Perform the Diagnostic System Check - Vehicle (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic System

Check - Vehicle) prior to using this diagnostic procedure.

* Review Strategy Based Diagnosis (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Strategy Based Diagnosis) for an

overview of the diagnostic approach.

* Diagnostic Procedure Instructions (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic Procedure

Instructions) provides an overview of each diagnostic category.

DTC Descriptors

DTC P0601

- Control Module Read Only Memory Performance

DTC P0602

- Control Module Not Programmed

DTC P0603

- Control Module Long Term Memory Reset

DTC P0604

- Control Module Random Access Memory Performance

2010 Cadillac Truck Escalade/ESV RWD V8-6.2L Page 2993

2010 Cadillac Truck Escalade/ESV RWD V8-6.2L Page 2993

1. Ignition OFF, disconnect the harness connector of the yaw rate sensor.

2. Ignition ON, verify that a test lamp illuminates between the module voltage circuit and ground.

瀚慖f the test lamp does not illuminate, test the circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the

EBCM.

3. Ignition OFF, test for less than 5 ohms between the module ground circuits and ground.

瀚慖f greater than the specified value, test the ground circuit for an open/high resistance. If the circuit tests normal, replace the EBCM.

4. If all circuits test normal, replace the yaw rate sensor.

Repair Instructions

Perform the Diagnostic Repair Verification (See: Verification Tests) after completing the diagnostic procedure.

* GMLAN Wiring Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic

Procedures/Wiring Repairs/GMLAN Wiring Repairs)

* ABS Description and Operation (See: Brakes and Traction Control/Antilock Brakes / Traction Control Systems/Description and

Operation/ABS Description and Operation) for the ABS - Hybrid

* Vehicle Yaw Sensor with Vehicle Lateral Accelerometer Replacement (See: Brakes and Traction Control/Antilock Brakes / Traction

Control Systems/Yaw Rate Sensor/Service and Repair/Less than 3900 kg (8600 lb) GVW) for the ABS - Non-Hybrid Less than 3900 kg

(8600 lb) GVW

* Vehicle Yaw Sensor with Vehicle Lateral Accelerometer Replacement (See: Brakes and Traction Control/Antilock Brakes / Traction

Control Systems/Yaw Rate Sensor/Service and Repair/Less than 3900 kg (8600 lb) GVW) for the ABS - Non-Hybrid Greater than/Equal to

3900 kg (8600 lb) GVW

* Control Module References (See: Testing and Inspection/Programming and Relearning) for module replacement, setup, and programming

U2157

DTC U2105-U2199

Diagnostic Instructions

* Perform the Diagnostic System Check - Vehicle (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic System

Check - Vehicle) prior to using this diagnostic procedure.

* Review Strategy Based Diagnosis (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Strategy Based Diagnosis) for an

overview of the diagnostic approach.

* Diagnostic Procedure Instructions (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic Procedure

Instructions) provides an overview of each diagnostic category.

DTC Descriptor

DTC U2142 00

- Lost Communication With Yaw Rate Sensor (YRS)

Circuit/System Description

Modules connected to the CAN bus serial data circuits monitor for serial data communications during normal vehicle operation. Operating

information and commands are exchanged among the modules. The modules have prerecorded information about what messages are needed to be

exchanged on the serial data circuits. The messages are supervised and also, some periodic messages are used by the receiver module as an

availability indication of the transmitter module. Each message contains the identification number of the transmitter module.

The electronic brake control module (EBCM) activates the other modules connected to the CAN serial data circuits by applying voltage when the

ignition key is in ACC, ON or START. The EBCM, Yaw Rate and Lateral Acceleration Sensor are the only modules connected to the CAN bus

serial data circuits. For more information on CAN bus serial data refer to Data Link Communications Description and Operation (See: Powertrain

Management/Computers and Control Systems/Information Bus/Description and Operation).

Conditions for Running the DTC

* The system voltage is between 9-16 volts.

* The vehicle power mode master requires serial data communication to occur.

Conditions for Setting the DTC

A supervised periodic message that includes the transmitter module availability has not been received.

Action Taken When the DTC Sets

2010 Cadillac Truck Escalade/ESV RWD V8-6.2L Page 2936

2010 Cadillac Truck Escalade/ESV RWD V8-6.2L Page 2936

1. Ignition OFF, disconnect the harness connector of the yaw rate sensor.

2. Ignition ON, verify that a test lamp illuminates between the module voltage circuit and ground.

瀚慖f the test lamp does not illuminate, test the circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the

EBCM.

3. Ignition OFF, test for less than 5 ohms between the module ground circuits and ground.

瀚慖f greater than the specified value, test the ground circuit for an open/high resistance. If the circuit tests normal, replace the EBCM.

4. If all circuits test normal, replace the yaw rate sensor.

Repair Instructions

Perform the Diagnostic Repair Verification (See: Verification Tests) after completing the diagnostic procedure.

* GMLAN Wiring Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic

Procedures/Wiring Repairs/GMLAN Wiring Repairs)

* ABS Description and Operation (See: Brakes and Traction Control/Antilock Brakes / Traction Control Systems/Description and

Operation/ABS Description and Operation) for the ABS - Hybrid

* Vehicle Yaw Sensor with Vehicle Lateral Accelerometer Replacement (See: Brakes and Traction Control/Antilock Brakes / Traction

Control Systems/Yaw Rate Sensor/Service and Repair/Less than 3900 kg (8600 lb) GVW) for the ABS - Non-Hybrid Less than 3900 kg

(8600 lb) GVW

* Vehicle Yaw Sensor with Vehicle Lateral Accelerometer Replacement (See: Brakes and Traction Control/Antilock Brakes / Traction

Control Systems/Yaw Rate Sensor/Service and Repair/Less than 3900 kg (8600 lb) GVW) for the ABS - Non-Hybrid Greater than/Equal to

3900 kg (8600 lb) GVW

* Control Module References (See: Testing and Inspection/Programming and Relearning) for module replacement, setup, and programming

U2129

DTC U2105-U2199

Diagnostic Instructions

* Perform the Diagnostic System Check - Vehicle (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic System

Check - Vehicle) prior to using this diagnostic procedure.

* Review Strategy Based Diagnosis (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Strategy Based Diagnosis) for an

overview of the diagnostic approach.

* Diagnostic Procedure Instructions (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic Procedure

Instructions) provides an overview of each diagnostic category.

DTC Descriptor

DTC U2142 00

- Lost Communication With Yaw Rate Sensor (YRS)

Circuit/System Description

Modules connected to the CAN bus serial data circuits monitor for serial data communications during normal vehicle operation. Operating

information and commands are exchanged among the modules. The modules have prerecorded information about what messages are needed to be

exchanged on the serial data circuits. The messages are supervised and also, some periodic messages are used by the receiver module as an

availability indication of the transmitter module. Each message contains the identification number of the transmitter module.

The electronic brake control module (EBCM) activates the other modules connected to the CAN serial data circuits by applying voltage when the

ignition key is in ACC, ON or START. The EBCM, Yaw Rate and Lateral Acceleration Sensor are the only modules connected to the CAN bus

serial data circuits. For more information on CAN bus serial data refer to Data Link Communications Description and Operation (See: Powertrain

Management/Computers and Control Systems/Information Bus/Description and Operation).

Conditions for Running the DTC

* The system voltage is between 9-16 volts.

* The vehicle power mode master requires serial data communication to occur.

Conditions for Setting the DTC

A supervised periodic message that includes the transmitter module availability has not been received.

Action Taken When the DTC Sets

2010 Cadillac CTS Sedan AWD V6-3.6L Page 496

2010 Cadillac CTS Sedan AWD V6-3.6L Page 496

1. Ignition OFF, disconnect the harness connector at the rear compartment lid latch.

2. Test for infinite resistance between the signal terminal C and the ground terminal B with the switch in the open position.

瀚慖f not the specified value, replace the rear compartment lid latch.

3. Test for less than 2 ohms between the signal terminal C and the ground terminal B with the switch in the closed position.

瀚慖f greater than the specified range, replace the rear compartment lid latch.

Repair Instructions

Perform the Diagnostic Repair Verification (See: Verification Tests) after completing the diagnostic procedure.

* Rear Compartment Lid Latch Replacement (See: Body and Frame/Doors, Hood and Trunk/Trunk / Liftgate/Trunk / Liftgate Latch/Service

and Repair)

* Control Module References (See: Testing and Inspection/Programming and Relearning) for BCM replacement, setup, and programming

B2508

DTC B2508 or B2509

Diagnostic Instructions

* Perform the Diagnostic System Check - Vehicle (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic System

Check - Vehicle) prior to using this diagnostic procedure.

* Review Strategy Based Diagnosis (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Strategy Based Diagnosis) for an

overview of the diagnostic approach.

* Diagnostic Procedure Instructions (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic Procedure

Instructions) provides an overview of each diagnostic category.

DTC Descriptors

DTC B2508 01

- Seat Heater Relay Circuit Short to Battery

DTC B2508 02

- Seat Heater Relay Circuit Short to Ground

Diagnostic Fault Information

Circuit/System Description

The driver and passenger seat heating elements are controlled by a common high current relay internal to the memory seat module (MSM) and by

individual low side element control circuits. The MSM connects the heated seat heater element supply voltage circuits for both seats to a common

reference point. This reference point is biased to approximately 2.5 V. Before the MSM will allow heated seat operation, it checks to see if this

reference voltage is shorted to ground or voltage. Once the module verifies that it is not closing to a shorted heating element, it allows for heated

seat operation. The module will then continue to monitor the heating elements for a shorted circuit.

2010 Cadillac Truck SRX AWD V6-3.0L Page 1183

2010 Cadillac Truck SRX AWD V6-3.0L Page 1183

1. Ignition OFF, disconnect the harness connector at the appropriate B52 HO2S.

2. Ignition ON, verify that a test lamp illuminates between the ignition voltage circuit terminal D and ground.

瀚慖f the test lamp does not illuminate, test the ignition voltage circuit for a short to ground or an open/high resistance. If the circuit tests

normal and the B52 HO2S heater circuit fuse is open, test all components connected to the fuse and replace as necessary.

3. Ignition ON, observe the appropriate scan tool HO2S Heater Control Open Circuit Test Status parameter. The parameter should display

Malfunction.

瀚慖f not the specified value, test the heater control circuit terminal E for a short to ground, or for a short to voltage. If the circuit tests

normal, replace the K20 ECM.

4. Connect a 3 A fused jumper wire between the heater control circuit terminal E and ground. Observe the appropriate scan tool HO2S Heater

Control Circuit Low Voltage Test Status parameter. The parameter should transition from OK to Malfunction.

瀚慖f not the specified value, test the heater control circuit terminal E for an open/high resistance. If the circuit tests normal, replace the K20

ECM.

Note:

* Less than 10 ohm of additional resistance on the ignition voltage circuit, or control circuit may set a DTC. If there is resistance on a

circuit, the driver will remain ON and the scan tool HO2S High Voltage Test Status parameter will display OK.

* Performing this test may set additional DTCs.

5. Ignition OFF, connect a 10 A fused jumper wire between the control circuit terminal E and the ignition voltage circuit terminal D.

6. Engine idling, observe the appropriate HO2S Control Circuit High Voltage Test Status parameter. The parameter should transition from Not

Run to Malfunction.

瀚慖f not the specified value, test the control circuit and the ignition voltage circuit for high resistance. If the circuits test normal, replace the

K20 ECM.

7. If all circuits test normal, test or replace the appropriate B52 HO2S.

Repair Instructions

Caution: Refer to Heated Oxygen Sensor Resistance Learn Reset Caution (See: Powertrain Management/Computers and Control

Systems/Oxygen Sensor/Service Precautions/Heated Oxygen Sensor Resistance Learn Reset Caution).

Perform the Diagnostic Repair Verification (See: Verification Tests) after completing the diagnostic procedure.

* Heated Oxygen Sensor Replacement - Bank 1 Sensor 1 (LF1) (See: Powertrain Management/Computers and Control Systems/Oxygen

Sensor/Service and Repair/Heated Oxygen Sensor Replacement - Bank 1 Sensor 1)

* Heated Oxygen Sensor Replacement - Bank 1 Sensor 2 (LF1) (See: Powertrain Management/Computers and Control Systems/Oxygen

Sensor/Service and Repair/Heated Oxygen Sensor Replacement - Bank 1 Sensor 2)

* Heated Oxygen Sensor Replacement - Bank 2 Sensor 1 (LF1) (See: Powertrain Management/Computers and Control Systems/Oxygen

Sensor/Service and Repair/Heated Oxygen Sensor Replacement - Bank 2 Sensor 1)

* Heated Oxygen Sensor Replacement - Bank 2 Sensor 2 (LF1) (See: Powertrain Management/Computers and Control Systems/Oxygen

Sensor/Service and Repair/Heated Oxygen Sensor Replacement - Bank 2 Sensor 2)

* Control Module References (See: Testing and Inspection/Programming and Relearning) for ECM replacement, setup, and programming

P135A

DTC P135A or P135B (LF1)

Diagnostic Instructions

* Perform the Diagnostic System Check - Vehicle (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic System

Check - Vehicle) prior to using this diagnostic procedure.

* Review Strategy Based Diagnosis (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Strategy Based Diagnosis) for an

overview of the diagnostic approach.

* Diagnostic Procedure Instructions (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic Procedure

Instructions) provides an overview of each diagnostic category.

DTC Descriptors

DTC P135A

- Ignition Coil Supply Voltage Circuit Bank 1

DTC P135B

- Ignition Coil Supply Voltage Circuit Bank 2

2010 Cadillac Truck Escalade/ESV RWD V8-6.2L Page 2525

2010 Cadillac Truck Escalade/ESV RWD V8-6.2L Page 2525

1. Ignition OFF, disconnect the harness connector at the K67 trailer brake control module.

2. Ignition ON, verify that a test lamp illuminates between the ignition circuit terminal 15 and ground.

瀚慖f the test lamp does not illuminate, test the ignition circuit for a short to ground or an open/high resistance.

3. If all circuits test normal, replace the K67 trailer brake control module.

Repair Instructions

Perform the Diagnostic Repair Verification (See: Verification Tests) after completing the diagnostic procedure.

Control Module References (See: Testing and Inspection/Programming and Relearning)for the trailer brake control module replacement, setup and

programming

6L50/6L80/6L90 - Automatic Transmission

DTC P2534

Diagnostic Instructions

* Perform the Diagnostic System Check - Vehicle (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic System

Check - Vehicle) prior to using this diagnostic procedure.

* Review Strategy Based Diagnosis (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Strategy Based Diagnosis) for an

overview of the diagnostic approach.

* Diagnostic Procedure Instructions (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic Procedure

Instructions)provides an overview of each diagnostic category.

DTC Descriptor

DTC P2534

- Ignition 1 Switch Circuit Low Voltage

Circuit/System Description

The transmission control module (TCM) samples the system voltage on the Ignition 1 voltage circuit every 0.1 seconds. Lower than normal voltage

may be inadequate to operate the transmission control solenoids properly. Improper solenoid operation may cause erratic transmission operation,

which may result in internal damage.

Conditions for Running the DTC

* The engine speed is greater than 500 RPM.

* Ignition voltage is between 8.6-19.0 volts.

Conditions for Setting the DTC

The TCM detects 6 volts or less on the ignition 1 voltage circuit at the TCM for 1.0 second or more.

Action Taken When the DTC Sets

* DTC P2534 is a Type A DTC.

* The TCM turns OFF HSD1 and HSD2.

* The TCM turns OFF all solenoids.

* The TCM commands maximum line pressure.

* The TCM freezes transmission adaptive functions.

* The TCM commands the TCC OFF.

* The TCM allows the vehicle to operate in transmission protection mode.

* The TCM disables Tap up and Tap down functions.

Conditions for Clearing the DTC

DTC P2534 is a Type A DTC.

Diagnostic Aids

If all circuit tests are OK, ensure the transmission pass through connector and harness terminals are clean and not damaged, and the charging

system is functioning correctly.

2010 Cadillac CTS Sedan AWD V6-3.6L Page 939

2010 Cadillac CTS Sedan AWD V6-3.6L Page 939

1. Ignition OFF, disconnect the harness connector at the appropriate heated oxygen sensor (HO2S).

2. Ignition ON, verify that a test lamp illuminates between the ignition circuit terminal D and ground.

Note: The ignition circuit supplies voltage to other components. Make sure you test all circuits for a short to ground or test all components

for being shorted that share the ignition circuit.

瀚慖f the test lamp does not illuminate, test the ignition circuit for a short to ground or an open/high resistance. If the circuit tests normal and

the ignition circuit fuse is open, test all the components connected to the ignition circuit and replace as necessary.

3. Connect a test lamp between the heater control circuit terminal C and B+. The test lamp should not illuminate.

瀚慖f the test lamp is always ON, test the control circuit for a short to ground. If the circuit/connections test normal, replace the ECM.

Note: The control circuit for the HO2S heater is pulled-up to voltage within the ECM, 2.0-3.0 volts on the control circuit is normal.

4. Idle the engine, and verify the test lamp illuminates or flashes.

瀚慖f the test lamp is always OFF, test the control circuit for an open/high resistance. If the circuit/connections test normal, replace the ECM.

5. Ignition ON, test for 2.0-3.0 V between the control circuit terminal C and ground.

瀚慖f not within the specified range, test the control circuit for a short to voltage. If the circuit/connections test normal, replace the ECM.

6. If all circuits/connections test normal, test or replace the HO2S sensor.

Component Testing

1. Ignition OFF, disconnect the harness connector at the heated oxygen sensor (HO2S) sensor.

2. Test for 5-25 ohm between the terminals C and D of the HO2S.

瀚慖f not within the specified range, replace the HO2S sensor.

Repair Instructions

Perform the Diagnostic Repair Verification (See: Verification Tests) after completing the diagnostic procedure.

* Heated Oxygen Sensor Replacement - Bank 1 Sensor 1 (LF1) (See: Powertrain Management/Computers and Control Systems/Oxygen

Sensor/Service and Repair)Heated Oxygen Sensor Replacement - Bank 1 Sensor 1 (LLT) (See: Powertrain Management/Computers and

Control Systems/Oxygen Sensor/Service and Repair)

* Heated Oxygen Sensor Replacement - Bank 1 Sensor 2 (LF1) (See: Powertrain Management/Computers and Control Systems/Oxygen

Sensor/Service and Repair)Heated Oxygen Sensor Replacement - Bank 1 Sensor 2 (LLT) (See: Powertrain Management/Computers and

Control Systems/Oxygen Sensor/Service and Repair)

* Heated Oxygen Sensor Replacement - Bank 2 Sensor 1 (LF1) (See: Powertrain Management/Computers and Control Systems/Oxygen

Sensor/Service and Repair)Heated Oxygen Sensor Replacement - Bank 2 Sensor 1 (LLT) (See: Powertrain Management/Computers and

Control Systems/Oxygen Sensor/Service and Repair)

* Heated Oxygen Sensor Replacement - Bank 2 Sensor 2 (LF1) (See: Powertrain Management/Computers and Control Systems/Oxygen

Sensor/Service and Repair)Heated Oxygen Sensor Replacement - Bank 2 Sensor 2 (LLT) (See: Powertrain Management/Computers and

Control Systems/Oxygen Sensor/Service and Repair)

* Control Module References (See: Testing and Inspection/Programming and Relearning) for engine control module replacement, setup, and

programming

P0052

DTC P0030, P0031, P0032, P0036, P0037, P0038, P0050, P0051, P0052, P0056, P0057, or P0058 (LLT)

Diagnostic Instructions

* Perform the Diagnostic System Check - Vehicle (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic System

Check - Vehicle) prior to using this diagnostic procedure.

* Review Strategy Based Diagnosis (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Strategy Based Diagnosis) for an

overview of the diagnostic approach.

* Diagnostic Procedure Instructions (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic Procedure

Instructions) provides an overview of each diagnostic category.

DTC Descriptors

DTC P0030

- HO2S Heater Control Circuit Bank 1 Sensor 1

2010 Cadillac Truck SRX AWD V6-3.0L Page 1485

2010 Cadillac Truck SRX AWD V6-3.0L Page 1485

1. Ignition OFF, disconnect the KR25 secondary air injection pump relay.

2. Test for 70-110 ohm between terminals 85 and 86.

瀚慖f the resistance is not within the specified range, replace the KR25 secondary air injection pump relay.

3. Test for infinite resistance between the following terminals:

* 86 and 87

* 86 and 30

* 85 and 87

* 87 and 30

瀚慖f not the specified value, replace the KR25 secondary air injection pump relay.

4. Install a 20 A fused jumper wire between relay terminal 86 and 12 V. Install a jumper wire between relay terminal 85 and ground. Test for

less than 2 ohm between terminals 87 and 30.

瀚慖f greater than the specified range, replace the KR25 secondary air injection pump relay.

Repair Instructions

Perform the Diagnostic Repair Verification (See: Verification Tests) after completing the diagnostic procedure.

* Relay Replacement (Attached to Wire Harness) (See: Power and Ground Distribution/Power Distribution Relay/Service and Repair/Relay

Replacement (Attached to Wire Harness))Relay Replacement (Within an Electrical Center) (See: Power and Ground Distribution/Power

Distribution Relay/Service and Repair/Relay Replacement (Within an Electrical Center))

* Secondary Air Injection Pump Replacement (See: Powertrain Management/Emission Control Systems/Air Injection/Air Injection

Pump/Service and Repair)

P0418

DTC P0418, P2257, or P2258

Diagnostic Instructions

* Perform the Diagnostic System Check - Vehicle (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic System

Check - Vehicle) prior to using this diagnostic procedure.

* Review Strategy Based Diagnosis (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Strategy Based Diagnosis) for an

overview of the diagnostic approach.

* Diagnostic Procedure Instructions (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic Procedure

Instructions)provides an overview of each diagnostic category.

DTC Descriptors

DTC P0418

- Secondary Air Injection Pump Control Circuit

DTC P2257

- Secondary Air Injection Pump Relay Control Circuit Low Voltage

DTC P2258

- Secondary Air Injection Pump Relay Control Circuit High Voltage

Diagnostic Fault Information

Circuit/System Description

The secondary air injection system aids in the reduction of hydrocarbon emissions during a cold start. The electric air pump forces fresh air into the

exhaust stream in order to accelerate the catalyst operation. Ignition voltage is supplied directly to the secondary air injection pump relay. The

engine control module (ECM) controls the relay by grounding the control circuit with a solid state device called a driver. The driver is equipped

with a feedback circuit that is pulled-up to a voltage. The ECM can determine if the control circuit is open, shorted to ground, or shorted to a

2010 Cadillac Truck SRX AWD V6-3.0L Page 349

2010 Cadillac Truck SRX AWD V6-3.0L Page 349

1. Ignition OFF, disconnect the RR CLOSURE relay.

2. Connect a test lamp between the control circuit terminal 85 and ground.

3. Ignition ON, command the Endgate Unlatch with a scan tool. The test lamp should turn ON when commanding the UNLATCH state.

瀚慖f the test lamp is always OFF, test the control circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace

the K9 BCM.

瀚慖f the test lamp is always ON, test the control circuit for a short to voltage. If the circuit tests normal, replace the K9 BCM.

4. If all circuits test normal, test or replace the RR CLOSURE relay.

Component Testing

1. Ignition OFF, disconnect the RR CLOSURE relay.

2. Test for 60-200 ohm between terminals 85 and 86.

瀚慖f not within the specified range, replace the RR CLOSURE relay.

3. Test for infinite resistance between the following terminals:

* 30 and 86

* 30 and 87

* 30 and 85

* 85 and 87

瀚慖f not the specified value, replace the RR CLOSURE relay.

4. Install a 3A fused jumper wire between relay terminal 85 and 12V. Install a jumper wire between relay terminal 86 and ground. Test for less

than 2 ohm between terminals 30 and 87.

瀚慖f greater than the specified range, replace the RR CLOSURE relay.

Repair Instructions

Perform the Diagnostic Repair Verification (See: Verification Tests) after completing the diagnostic procedure.

* Relay Replacement (Attached to Wire Harness) (See: Power and Ground Distribution/Power Distribution Relay/Service and Repair/Relay

Replacement (Attached to Wire Harness))Relay Replacement (Within an Electrical Center) (See: Power and Ground Distribution/Power

Distribution Relay/Service and Repair/Relay Replacement (Within an Electrical Center))

* Control Module References (See: Testing and Inspection/Programming and Relearning)for BCM replacement, setup and programming

B364A

DTC B364A

Diagnostic Instructions

* Perform the Diagnostic System Check - Vehicle (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic System

Check - Vehicle) prior to using this diagnostic procedure.

* Review Strategy Based Diagnosis (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Strategy Based Diagnosis) for an

overview of the diagnostic approach.

* Diagnostic Procedure Instructions (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic Procedure

Instructions)provides an overview of each diagnostic category.

DTC Descriptor

DTC B364A 00

- Surveillance Mode Switch Circuit Malfunction

Diagnostic Fault Information

Circuit/System Description

The front fog lamp relay is supplied with battery voltage at all times. The front fog lamp switch signal circuit is grounded momentarily by pressing

the front fog lamp switch. The body control module (BCM) energizes the front fog lamp relay by applying ground to the front fog lamp relay

2010 Cadillac Truck Escalade/ESV RWD V8-6.2L Page 2101

2010 Cadillac Truck Escalade/ESV RWD V8-6.2L Page 2101

1. Ignition OFF, disconnect the KR20 cooling fan relay.

2. Test for 50-90 ohm between terminals 85 and 86.

瀚慖f not within the specified range, replace the KR20 cooling fan relay.

3. Measure the resistance between the terminals listed below:

* 30 and 86

* 30 and 87

* 30 and 85

* 85 and 87

The DMM should display OL.

瀚慖f less than the specified range, replace the KR20 cooling fan relay.

4. Test the KR20E Fan Control Relay for less than 2 ohm between terminals 30 and 87A.

瀚慖f greater than the specified range, replace the KR20E cooling fan relay.

5. Connect a 20 A fused jumper wire between relay terminal 85 and B+. Connect a jumper wire between relay terminal 86 and ground. Test for

less than 2 ohm between terminals 30 and 87.

瀚慖f greater than the specified range, replace the KR20 cooling fan relay.

Repair Instructions

Perform the Diagnostic Repair Verification (See: Verification Tests) after completing the diagnostic procedure.

* Relay Replacement (Attached to Wire Harness) (See: Power and Ground Distribution/Power Distribution Relay/Service and Repair/Relay

Replacement (Attached to Wire Harness))Relay Replacement (Within an Electrical Center) (See: Power and Ground Distribution/Power

Distribution Relay/Service and Repair/Relay Replacement (Within an Electrical Center))

* Underhood Electrical Center or Junction Block Replacement (See: Maintenance/Fuses and Circuit Breakers/Fuse Block/Service and

Repair/Removal and Replacement/Underhood Electrical Center or Junction Block Replacement)

* Engine Coolant Fan Replacement (HP2) (See: Engine, Cooling and Exhaust/Cooling System/Radiator Cooling Fan/Service and

Repair/Engine Coolant Fan Replacement)Engine Coolant Fan Replacement (Non-HP2) (See: Engine, Cooling and Exhaust/Cooling

System/Radiator Cooling Fan/Service and Repair/Engine Coolant Fan Replacement)

* Control Module References (See: Testing and Inspection/Programming and Relearning) for ECM replacement, setup and programming

P0496

DTC P0496

Diagnostic Instructions

* Perform the Diagnostic System Check - Vehicle (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic System

Check - Vehicle) prior to using this diagnostic procedure.

* Review Strategy Based Diagnosis (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Strategy Based Diagnosis) for an

overview of the diagnostic approach.

* Diagnostic Procedure Instructions (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic Procedure

Instructions) provides an overview of each diagnostic category.

DTC Descriptor

DTC P0496

- Evaporative Emission System Flow During Non-Purge

Circuit/System Description

This DTC tests for undesired intake manifold vacuum flow to the evaporative emission (EVAP) system. The engine control module (ECM) seals

the EVAP system by commanding the EVAP canister purge solenoid valve OFF and the EVAP canister vent solenoid valve ON. The ECM

monitors the fuel tank pressure (FTP) sensor to determine if a vacuum is being drawn on the EVAP system. If vacuum in the EVAP system is more

than a predetermined value within a predetermined time, this DTC sets.

The following table illustrates the relationship between the ON and OFF states, and the Open or Closed states of the EVAP canister purge and vent

2010 Cadillac CTS Sedan AWD V6-3.6L Page 528

2010 Cadillac CTS Sedan AWD V6-3.6L Page 528

1. Ignition OFF, disconnect the harness connector at the tilt/telescope switch.

2. Ignition ON, verify a test lamp illuminates between terminal 4 and ground.

瀚慖f the test lamp does not illuminate, test the B+ circuit for a short to ground or an open/high resistance.

3. Verify with the scan tool that the appropriate switch parameter is Inactive.

瀚慖f not the specified value, test the appropriate signal circuit for a short to voltage. If the circuit tests normal, replace the MSM.

4. Install a 3A fused jumper wire between the appropriate circuit terminal 1, 2, 3, or 5 and terminal 4. Verify with the scan tool that the

appropriate switch parameter is Active.

瀚慖f not the specified value, test the signal circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the

MSM.

5. If all circuit test normal, test or replace the tilt/telescope switch.

Component Testing

Tilt/Telescope Switch

1. Ignition OFF, disconnect the harness connector at the tilt/telescope switch.

2. Test for infinite resistance between terminals 1, 2, 3, and 5 with the switch in the neutral position:

瀚慖f less than the specified range, replace the tilt/telescope switch.

3. Test for less than 1 ohm between terminal 4 and terminals 1, 2, 3, and 5 with the switch in each appropriate position.

瀚慖f greater than the specified value, replace the tilt/telescope switch.

Repair Instructions

Perform the Diagnostic Repair Verification (See: Verification Tests) after completing the diagnostic procedure.

* Steering Column Replacement (See: Steering and Suspension/Steering/Steering Column/Service and Repair/Steering Column Replacement)

* Control Module References (See: Testing and Inspection/Programming and Relearning)for MSM replacement, setup, and programming

B2860

DTC B2860 or B2880

Diagnostic Instructions

* Perform the Diagnostic System Check - Vehicle (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic System

Check - Vehicle) prior to using this diagnostic procedure.

* Review Strategy Based Diagnosis (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Strategy Based Diagnosis) for an

overview of the diagnostic approach.

* Diagnostic Procedure Instructions (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic Procedure

Instructions)provides an overview of each diagnostic category.

DTC Descriptors

DTC B2860 01

- Telescope Position Sensor Circuit Short to Battery

DTC B2860 06

- Telescope Position Sensor Circuit Short to Ground or Open

DTC B2860 5A

- Telescope Position Sensor Circuit Plausibility Failure

DTC B2860 61

- Telescope Position Sensor Actuator Stuck

DTC B2880 01

- Tilt Position Sensor Circuit Short to Battery

DTC B2880 06

- Tilt Position Sensor Circuit Short to Ground or Open